Note 15: Disclosures About Fair Value of Financial Instruments: Fair Value, Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Impaired Loans
Non-recurring Assets, Fair Value Disclosure	$ 635	$ 2,805
Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	1,112	1,776
Fair Value, Inputs, Level 1 | Impaired Loans
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Impaired Loans
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Impaired Loans
Non-recurring Assets, Fair Value Disclosure	635	2,805
Fair Value, Inputs, Level 3 | Foreclosed assets held for sale
Non-recurring Assets, Fair Value Disclosure	$ 1,112	$ 1,776